Reflecting-lamp.



H. A. DOUGLAS.

REFLEQUNG LAMP. AEPUCATION k"H-El) FEB. 19.1917.

Patented Apr.. 9, 1918,.

narran sraras radianti onirica.

HARRY A. DOUGLAS, BRONSON, MICHIGAN, ASSIGNOR TO DOUGLAS & RUDD MFG'. CO., I

OF BRONSON, MICHIGAN, A CORPORATION 0F MICHIGAN.

E EFL'ECTING-LAMP.

l w.. Specification of Letters Patent.

Patented. Apr. e, isis.

Application led February 19, 1917. Serial No. 149,667.

T 0 all whom may concern.'

Be it known that I, Hanny A. DOUGLAS,

a citizen of the United States, residing at' Bronson. in the county of Branch and State of Michigan. have invented a certain new and useful Improvement in Reflecting- Lamps. of which theI following` is a full, clear, concise. and exact description.

M v invention relates to reflecting lamps and has a number of objects and advantages in view. ln my invention there are included a holder, preferably in llre form of a shell, and a lamp bulb or light source held thereby. My invention is of particular service in connection with electric lamps, and affords an improved means for effecting its assembly and enabling its adjustment.

l will explain my invention more fully b v reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure 1 is a side elevation partially in section of a reecting lamp containing features of my invention; Fig. Q, is

a longitudinal view partially in sectionand partially in elevation of portions of the structure illustrated in Fig. 1; Fig. 3 is a view on line 3 3 of Fig. 4; and Fig. 4 is a `view on line '-l--i of Fig. 3.

Like parts are indicated by similar characters of reference throughout the different figures.

The concave reflector 1 is received in the concave casing 2 and is coupled therewith in any suitable way, space intervening between the reflector and casing. The reflector includes a rearwardly extending tubular continuation 3 in fixed relation with the balance of the reflector, this continuation constituting a holder or mounting that is in the form of a tubular neck. A spring tongue 4 presses transversely of and upon said. neck and is preferably integrally-formed with a shell 5 that constitutes a holder for contact carriers, v

this spiifng tongue having ample clearance at its side'ihargins to permit it freely to function. Some part of the tongue, preferably the rear free end thereof, has a part '6 projecting therefrom which is narrower than the balance of the tongue and is slightly narrower than a slot 7 in the neck 3 whereby this portion may project into the slot to prevent the shell from turning with respect to the slot While at the same time the side margins of the tongue 4f are adapted to press against the side margins of the slot 7. The tongue thus presses upon a surface of the neck 3 and, where there is but one tongue, forces the shell toward the opposite side of the neck whereby the shell is held in engagement with the neck 3. The slot 7 is elongated so that the shell 5 may be moved back and forth in its holding neck 3 whereby in the struciure illustrated, the position of the lamp bulb 8 which is carried at the forwardend of the shell in front of the reflector may be adjusted with respect to the reflector. The base 9 of the lamp bulb S constitutes the forward contact carrier and as the arrangement illustrated is a double pole arrangement this contact carrier 9 carries two rear contacts 10 and 11. The lamp base or contact carrier 9 is provided with bayonet pins (of which one -12 is shown) engageable within bayonet seats (of which one 13 is shown) constituting parts of bayonetslots (of which one 1l is shown). The rear contact carrying plug l5 is provided with terminal blocks lshaving' binding screws 17 by which circuit wires may be secured to the terminal blocks. These terminal blocks are desirably cylindrical and the forward ends thereof are desir-ably tubular, springs (of which one 18 is shown) being included in the tubular portions of the terminal blocks and operating to press contacts 19 20 forwardly into engagement with the contacts 19-and 11. The springs 18-and the contacts 19 and Q0 thus not only servg/a/)lfto establish circuit for the lamp but also op@ @irate to hold the lamp base 9 in bayonet pin and slot connection with the shell 5. The shell 5 and all of the parts within it are in front of the casing 2 and in order that the shell may be moved in and out I attach a rod 21' to the shell 5 preferably by anchoring the rod within the plug 15 by means of a pin 22. This rod is accessible upon the eX- `terior of the'casing for the purpose of moving it back and forth or longitudinally whereby the shell and the lamp bulb carried thereby are correspondingly moved. The rear end of the rod 21 is threaded and has threaded engagement with a sleeve 23 that has an external head 24; engaging the eX- terior of the casing and which is surrounded by a washer 25 that engages the interior of the casing whereby said sleeve is confined to a single plane ofrotation and is prevented from moving back and forth. The head 2e is provided with a screw driver slot 26 (in which a coin may be inserted) whereby the sleeve may be turned and as the sleeve cannotmove back and forth the rod 21 must be moved back and forth Whenever the sleeve is turned. By this arrangement the lamp 8 is moved in and out to secure any desired relation to the reflector. The spring 4t per* mits the longitudinal movement of the shell and as its pressure is comparatively heavy it holds the shell in any position to which it may be adjusted.

' Any suitable means may be employed for establishing circuit relation between the contacts upon the plug 15 and the external source of current, there being illustrated the well known form of connector 151 which may be employed for this purpose.

While I have herein shown andparticu- .ularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made Without de parting from the spirit of my invention, but having thus described my invention I claim Vas new and desire to secure by Letters Patent the following:`

1. In a reflecting lamp, the combination with a light source; of a light source holder, a concave reflector having a neck containing the aforesaid holder; and a spring tongue carried by said holder and exerting pressure transversely of and upon the neck and holder to maintain them in assembly.

In a reflecting lamp, the combination with a light source; of a light source holderl movable in and out; a concave reflector having` a neck containing the aforesaid holder; and a spring tongue carried by said holder and exerting pressure transversely of and upon the neck and holderto maintain them in assembly, the neck having a slot into which a portion of the spring tongue projects, the slot being elongated to permit the light source holder to move in and out.

3. In a reflecting lamp, the combination with a light source; of a light source holder; a concave reflector havingl a neck containing the aforesaid holder; and a spring tongue carried by said holder, the neck having a slot into which a portion of the spring tongue projects, side portions of said tongue pressing transversely of the neck and holder upon portions margining said slot to maintain the neck and holder in assembly.

4L In a reflecting lamp, the combination with a light source; of a light source holder movable in and out; a concave reflector having a neck containing the aforesaid holder; and a spring tongue carried by said holder, the neck having a slot in which the'spring longue projects, side parts of said tongue pressing transversely of the holders upon portions margining said slot to maintain the neck and holder in assembly, the slot being elongated to permit the light source holder to move in and out. 5. In a reflecting lamp, the-combination with a light source; of a light source holder movable in and out; a concave reflector having a neck lcontaining the aforesaid holder; a spring tongue carried by said holder and exerting pressure transversely of and upon the neck and holder to maintain them in assembly, the neck having a slot into which a portion of the spring tongue projects, the slot being elongated to permit the light source holder to move in and out; and a rod connected with the light source holder and operable from the exterior of the lamp to move-this holder'in and out.. l

' 6. In a reflecting lamp, the combination with a light source; ofa light source holder movable in and out; a concave reflector having a neck containin the aforesaid holder; a spring tongue carrled by said holder, the neck having a slot into which a portion of the spring tongue projects, side parts of said tongue pressing transversely of the neck and holder upon portions margining Said. slot to maintain the neck and holder in assembly; and a rod connected with the light source holder and operable from the exterior of the lamp to move said holder in and out.

In a reflecting lamp, the combination with a light source; of a light source holder movable in and out; aconcave reflector having a neck containing the aforesaid holder; a spring tongue carried by said holder, the neck having a slot in which the spring tongue projects, side parts of said tongue pressing transversely of the neck and holder upon portions margining said slot to maim tain the neck and holder in assembly, the slot being elongated to permit the light source holder to move in and out; and a rod connected with the light sourceholder and operable from the exterior of the lamp to, move said holder in and out.

In witness whereof, I hereunto subscribe my name this 24th day of January, A.r D.

HARRY A. DOUGLAS. 

